Onset of collisionless magnetic reconnection in thin current sheets : Three-dimensional particle simulations
Onset of collisionless magnetic reconnection in thin current sheets : Three-dimensional particle simulations
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DOI：
10.1063/1.1597494
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发表时间：
2003-08
影响因子：
2.2
通讯作者：
M. Scholer;I. Sidorenko;C. Jaroschek;R. Treumann;A. Zeiler
中科院分区：
文献类型：
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作者：
M. Scholer;I. Sidorenko;C. Jaroschek;R. Treumann;A. Zeiler
采用三维粒子模拟方法研究了无碰撞磁场重联。初始平衡是一个双哈里斯片平衡和周期性的边界条件，假设在所有三个方向。最初不施加磁性种子岛，并且不施加流动条件。假设电流片宽度是用电流片中心的密度计算的一个离子惯性长度。离子与电子的质量比为mi/me=150，这抑制了漂移扭结不稳定性的增长。已经进行了两个不同的运行：一个模拟与完全反平行的磁场和一个模拟与恒定的引导场的大小相同的反平行场叠加。在反平行的情况下，由低杂波漂移不稳定性（LHDI）激发的波的感应场导致电流片中心的电子快速加速，随后导致电流片变薄。目前，在CE…
Three-dimensional (3D) particle-in-cell simulations of collisionless magnetic reconnection are presented. The initial equilibrium is a double Harris-sheet equilibrium and periodic boundary conditions are assumed in all three directions. No magnetic seed island is imposed initially, and no flow conditions are imposed. The current sheet width is assumed to be one ion inertial length calculated with the density in the center of the current sheet. The ion to electron mass ratio is mi/me=150, which suppresses the growth of the drift kink instability. Two different runs have been performed: a simulation with exactly antiparallel magnetic field and a simulation with a constant guide field of the same magnitude as the antiparallel field superimposed. In the antiparallel case the inductive field of the waves excited by the lower hybrid drift instability (LHDI) leads to rapid acceleration of the electrons in the center of the current sheet and subsequently to a current sheet thinning. The current increase in the ce...